CN101919146B - Buck converter for making power available to at least one led - Google Patents
Buck converter for making power available to at least one led Download PDFInfo
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- CN101919146B CN101919146B CN2008801250793A CN200880125079A CN101919146B CN 101919146 B CN101919146 B CN 101919146B CN 2008801250793 A CN2008801250793 A CN 2008801250793A CN 200880125079 A CN200880125079 A CN 200880125079A CN 101919146 B CN101919146 B CN 101919146B
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- buck
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- auxiliary
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators without using an external clock
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/375—Switched mode power supply [SMPS] using buck topology
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention relates to a buck converter for making power available to at least one LED, comprising a buck diode (D2), a buck throttle (TR1, w1) and a main buck switch (Q1), the buck diode (D2) and the main buck switch (Q1) being connected in series between the first (E1) and the second input connection (E2), the connecting point (VP1) between the buck diode (D2) and the main buck switch (Q1) being connected to the second output connection (A2); the first connection of the buck throttle (TR1, w1) being connected to the first input connection (E1) and the second connection of the buck throttle (TR1, w1) to the first output connection (A1); the buck converter further comprising: a first auxiliary winding (TR1, w1) connected to the buck throttle, said auxiliary winding being connected to the second input connection (E2) and to the control electrode of the main buck switch (Q1), the first auxiliary winding (TR1, w3) being connected to the buck throttle (TR1, w1) in such a manner that when power flows through the main buck switch (Q1), the first auxiliary winding (Tr1, w3) makes power available to the control electrode of the main buck switch (Q1).
Description
Technical field
The present invention relates to a kind of step-down controller that is used at least one light-emitting diode that electric current is provided (Buck-Konverter), this step-down controller has: have the input of first input end and second input terminal, be used to connect DC power supply; Have the output of first lead-out terminal and second lead-out terminal, be used to connect at least one light-emitting diode; And Buck diode, Buck inductance coil and Buck main switch, this Buck main switch has control electrode, work electrode and reference electrode.
Background technology
Enter along with LED in the wide spectrum of general lighting, formed huge demand for the power supply circuits simple and with low cost of this device.A kind of known converter circuit of using at electrical network that is used for driving LED is so-called inverted converter (Sperrwandler), to its also common name anti exciting converter (Flyback).In addition, there is multiple especially integrated circuit to be used for step-down controller or boost converter simultaneously, for example the control IC MXHV9910 of Micronix company.Shortcoming during these are realized is: they all need quite significant expense, and regulation is used expensive device.Like this, the switch of inverted converter must have the compressive resistance of 700V at least under the situation of European line voltage.For using in batch process, consequent cost surpasses budget given in advance usually.
Summary of the invention
Therefore, task of the present invention is that the step-down controller that the improvement beginning is mentioned makes it to realize by cost very cheaply.
This task solves by the step-down controller with the described feature of claim 1.
The present invention based on understanding be: the bipolar transistor that cost is very cheap, as it for example is type MPSA42 known in the video field, only having little electric current on the one hand for the required electric current of power LED under these transistorized situations amplifies, and must turn-off in the moment that limits on the other hand, the electric current of Xian Dinging is suitable for LED equally thus.
The present invention now further based on be: in order to reduce the load of switch, Buck diode and Buck main switch in series are coupling between first input end and second input terminal wherein tie point between Buck diode and Buck main switch and second lead-out terminal coupling.The first terminal of Buck inductance coil and the coupling of first input end, and second terminal of Buck inductance coil and the coupling of first lead-out terminal.Problem following solution that less current is amplified in to the scope of the required electric current of the driving of power LED: take measures, so that provide enough base currents for the Buck main switch according to the present invention.For this reason, step-down controller comprises also and the first auxiliary winding of Buck inductance coil coupling that it has the first terminal, this first terminal and the coupling of second input terminal; And first auxiliary winding have second terminal, the control electrode coupling of this second terminal and Buck main switch, the wherein first auxiliary winding and the coupling of Buck inductance coil makes and assists winding electric current to be offered the control electrode of Buck main switch by first under the situation of electric current process Buck main switch.
These measures can realize the structure extremely simple and with low cost of step-down controller.In addition, they can be implemented in the operation in the critical conduction mode, and wherein the turn-off power loss of Buck main switch appears in only actually.
In a preferred form of implementation, step-down controller also comprises current measurement resistance, itself and Buck main switch are in series, especially be coupled between the tie point that is limited by Buck diode and Buck main switch and second input terminal, and this step-down controller comprises first auxiliary switch, be used to turn-off the Buck main switch, wherein first auxiliary switch has control electrode, work electrode and reference electrode, the wherein reference electrode of first auxiliary switch and second input terminal coupling, and the wherein control electrode and the current measurement resistance coupling of first auxiliary switch.Arrange that by this produce voltage under the situation of the maximum current that reaches process Buck main switch that can be given in advance on current measurement resistance, this voltage causes connecting first auxiliary switch, wherein connects first auxiliary switch and turn-offs the Buck main switch.
Preferably, step-down controller also comprises the time link, and this time link is coupling between the control electrode of the current measurement resistance and first auxiliary switch.What can guarantee thus is that though the electric current that provides on the control electrode of first auxiliary switch turn-offs owing to the Buck main switch and reduced, first auxiliary switch still keeps connecting.Preferred time constant for example at 0.2 μ s to the magnitude between the 10 μ s, be preferably 1 μ s.
In addition, preferably, between the control electrode of second terminal of the first auxiliary winding and Buck main switch, be coupled with first Ohmic resistance.In addition, preferably, be coupled by second Ohmic resistance and second input terminal at this tie point between the control electrode of first Ohmic resistance and Buck main switch.Thus, the control end of Buck main switch is with than low resistance mode locking, and insensitive for the interference of coupling input thus.
In addition, preferably, the coupling of the work electrode of the control electrode of Buck main switch and first auxiliary switch.
In a preferred improvement project, what can design is, step-down controller also comprises second auxiliary switch, be used to start step-down controller, wherein second auxiliary switch has control electrode, work electrode and reference electrode, the wherein reference electrode of second auxiliary switch and first input end coupling, wherein the control electrode of second auxiliary switch is by Ohmic resistance and the coupling of second input terminal.By this measure, be connected between first input end and second input terminal in case guaranteed DC power supply, then second auxiliary switch is connected.
Preferably, the work electrode of second auxiliary switch is by the work electrode coupling of the Ohmic resistance and first auxiliary switch.In case second auxiliary switch is connected, then electric current is offered the control electrode of Buck main switch by this Ohmic resistance, make this Buck main switch connect equally.Correspondingly, flow in the control electrode of Buck main switch by the electric current of the first auxiliary winding generation and the electric current that flows by second auxiliary switch of connecting.
Preferably, step-down controller comprises also and the second auxiliary winding of Buck inductance coil coupling that it has the first terminal, this first terminal and the coupling of first input end, and this second auxiliary winding has second terminal, the control electrode coupling of this second terminal and second auxiliary switch.Preferably, be coupled with Ohmic resistance at this between the control electrode of second terminal of the second auxiliary winding and second auxiliary switch, preferred coupled has the series circuit of Ohmic resistance and diode.At this, the second auxiliary winding especially is coupled with the Buck inductance coil, make the Buck main switch during the stage or during the demagnetization stage at the Buck inductance coil, electric current is offered the control electrode of second auxiliary switch, thereby make second auxiliary switch end.Thus, can prevent the electric current by following Ohmic resistance: this Ohmic resistance is with the work electrode coupling of the work electrode and first auxiliary switch of second auxiliary switch, make in this Ohmic resistance, only in the of short duration connection stage of Buck main switch, to produce loss power, and this Ohmic resistance is worked almost losslessly in the off-phases of the length of Buck main switch.
For the ripple (Rippel) that reduces the electric current that offers described at least one LED, preferably between first input end and second lead-out terminal, be coupled with at least one capacitor in addition.
Other preferred forms of implementation are by obtaining in the dependent claims.
Description of drawings
Further describe embodiment referring now to accompanying drawing below according to step-down controller of the present invention.Wherein:
Fig. 1 shows the schematic diagram according to the embodiment of step-down controller of the present invention;
The electric current I that Fig. 2 shows the time changing curve of the collector emitter voltage on the Buck main switch and offers described at least one LED with very first time resolution
LEDTime changing curve; And
The electric current I that Fig. 3 shows the time changing curve of the collector emitter voltage on the Buck main switch and offers described at least one LED with second temporal resolution
LEDTime changing curve.
Embodiment
Fig. 1 shows an embodiment according to step-down controller of the present invention in the diagram.This step-down controller has the sub-E1 of first input end and the second input terminal E2, and they link to each other with electrical network terminal L, N by rectifier GL1.The inductance L 1 that is arranged between electrical network terminal L and the rectifier GL1 is used to limit making current and removes radio interference.Be provided with capacitor C9 in order to cushion by the line voltage of rectification.Between input terminal E1 and E2, be coupled with the series circuit of Buck diode D2 and Buck main switch Q1 usually.The Buck inductance coil is coupling between the sub-E1 of first input end and the first lead-out terminal A1, wherein is embodied as the first winding w1 of transformer TR1 at this Buck inductance coil, and this transformer also has the first auxiliary winding w2 and the second auxiliary winding w3.Tie point VP1 that between Buck diode D2 and Buck main switch Q1, is provided with and the second lead-out terminal A2 of step-down controller coupling.Between lead-out terminal A1, A2, be coupled with two capacitor C2, C3.
Between the emitter of Buck main switch Q1 and the second input terminal E2, be provided with Ohmic resistance R6 as shunt.The voltage of landing guides to the base stage of the first auxiliary switch Q3 by the time link that comprises Ohmic resistance R3 and capacitor C1 through Ohmic resistance R4 on this resistance R 6, because drop to zero at about 200ns by the electric current of Buck main switch Q1 in 300ns after Buck main switch Q1 turn-offs.With will be on the resistance R 6 voltage of landing directly be coupled (i.e. the intermediate circuit of not free link) compare to the situation of the base stage of the first auxiliary switch Q3, by what this time link can guarantee be: keep the first auxiliary switch Q3 to connect more longways.
At first by resistance R 1 and auxiliary winding w3 coupling, secondly the work electrode with auxiliary switch Q3 is coupled the control electrode of Buck main switch Q1.Its three, the control electrode of Buck main switch Q1 also is coupled by Ohmic resistance R2 and the second input terminal E2.Another auxiliary switch Q2 is coupled with its reference electrode and the sub-E1 of first input end, and with the work electrode coupling of its work electrode by Ohmic resistance R8 and auxiliary switch Q3.The control electrode of auxiliary switch Q2 is on the one hand by Ohmic resistance R5 and second input terminal E2 coupling, and series circuit and the auxiliary winding w2 by diode D1 and Ohmic resistance R7 is coupled on the other hand.Diode D1 is used as under low excessively line voltage situation at this and starts diode, and promptly switch Q2 begins just to connect from the line voltage of 160V to 170V.
Auxiliary winding w3 and the equidirectional winding of winding w1, and the direction of winding of winding w2 is opposite with the direction of winding of winding w1.
For following working method: electric current flows through input terminal E2, auxiliary winding w2, Ohmic resistance R7, diode D1 and Ohmic resistance R5 and causes connecting auxiliary transistor Q2 after applying line voltage.Thus, base current is offered the base stage of Buck main switch Q1, this causes connecting Buck main switch Q1.At this,, guaranteed that Buck main switch Q1 itself is provided enough base currents under the situation of the high electric current that offers described at least one LED by designing transformer TR1 suitably, especially suitably designing winding w3.When the needs base current, when Buck main switch Q1 connects,, use or rather so accurately base current is offered Buck main switch Q1 by auxiliary winding w3.If the emitter current of Buck main switch produces voltage drop on shunt, this voltage drop is enough to connect auxiliary switch Q3, then the electric current that is provided by auxiliary switch Q2 no longer flows to the control electrode of Buck main switch Q1, but flows to input terminal E2 by auxiliary switch Q3.Turn-off Buck main switch Q1 thus.
Different with inverted converter, loaded with the voltage between input terminal E1, the E2 at this Buck main switch Q1 the biglyyest.In addition, this circuit design is for making turn-off time t
OffBe approximately t turn-on time
On20 times.In a preferred embodiment, turn-off time t
OffBe approximately 40 μ s, and turn-on time t
OnCorrespond to 2 μ s.
Guaranteed correspondingly that by reverse coupled winding w2 and w3 Buck main switch Q1 and auxiliary switch Q2 are ended reliably, up to the complete demagnetization of Buck inductance coil TR1, w1 quilt.Thus, Buck main switch Q1 works in critical conduction mode (Critical Conduction Mode) (transition mode (Transition mode)), make this Buck main switch can connect on low-loss ground in the cycle subsequently, the electric current that promptly flows through Buck main switch Q1 is constantly almost nil in connection.The frequency of the delta current of process Buck inductance coil TR1, w1 is by the input line voltage U between terminal
N, the LED voltage U on output
LED, Buck inductance coil TR1, w1 inductance and maximum LED electric current I
LEDBoundary value determine.
Fig. 2 shows electric current I at the embodiment that realizes by the design that provides among Fig. 1
LEDThe time changing curve, the collector emitter voltage U of Buck main switch Q1 of envelope
CEThe time changing curve of envelope and the time changing curve of warbled envelope.Minimum frequency is 23.12kHz, and peak frequency is 28.16kHz.Although Buck main switch Q1 works electric current I in critical conduction mode
LEDBecause the effect of capacitor C2 and C3 never is reduced to zero.Its minimum value is approximately 60mA at this, and its maximum is 130mA.
The view of Fig. 2 illustrates with the resolution of the 2ms of per time unit's (=little lattice), and the resolution among Fig. 3 is the 20 μ s of per time unit.It shows the collector emitter voltage U of Buck main switch Q1
CeAnd electric current I
LEDTime changing curve.As in voltage U
CeTime changing curve on can know see like that, t turn-on time of Buck main switch Q1
OnBe about 2 μ s, and turn-off time t
OffBe about 38 μ s.Electric current I
LEDThe fuzzy triangle of time changing curve be that effect owing to capacitor C2 and C3 forms.
Claims (14)
1. step-down Buck transducer that is used at least one light-emitting diode that electric current is provided, this step-down Buck transducer has:
-have the input of first input end (E1) and second input terminal (E2), be used to connect DC power supply;
-have the output of first lead-out terminal (A1) and second lead-out terminal (A2), be used to connect described at least one light-emitting diode; And
-Buck diode (D2), Buck inductance coil (TR1, w1) and Buck main switch (Q1), this Buck main switch has control electrode, work electrode and reference electrode;
It is characterized in that,
Buck diode (D2) and Buck main switch (Q1) in series are coupling between first input end (E1) and second input terminal (E2), wherein tie point (VP1) between Buck diode (D2) and Buck main switch (Q1) and second lead-out terminal (A2) coupling;
Wherein Buck inductance coil (TR1, the first terminal w1) and first input end (E1) coupling, Buck inductance coil (TR1, second terminal w1) and first lead-out terminal (A1) coupling;
Wherein step-down Buck transducer also comprises:
With the Buck inductance coil (TR1, w1) first of the coupling auxiliary winding (TR1, w3), it has the first terminal, this first terminal is coupled with second input terminal (E2); And this first auxiliary winding has second terminal, the control electrode coupling of this second terminal and Buck main switch (Q1), wherein first assist winding (TR1, w3) with Buck inductance coil (TR1, w1) coupling, make that (TR1 w3) offers electric current the control electrode of Buck main switch (Q1) by the first auxiliary winding under through the situation of Buck main switch (Q1) at electric current.
2. step-down Buck transducer according to claim 1 is characterized in that,
Step-down Buck transducer also comprises: current measurement resistance (R6), and itself and Buck main switch (Q1) in series are coupled; And comprise that first auxiliary switch (Q3) is used to turn-off Buck main switch (Q1), wherein first auxiliary switch (Q3) has control electrode, work electrode and reference electrode, the wherein reference electrode of first auxiliary switch (Q3) and second input terminal (E2) coupling, and the wherein control electrode and current measurement resistance (R6) coupling of first auxiliary switch (Q3).
3. step-down Buck transducer according to claim 2 is characterized in that,
Step-down Buck transducer also comprises the time link, and (C1, R3), this time link is coupling between the control electrode of current measurement resistance and first auxiliary switch (Q3).
4. according to one of aforesaid right requirement described step-down Buck transducer, it is characterized in that,
(TR1 is coupled with first Ohmic resistance (R1) between the control electrode of second terminal w3) and Buck main switch (Q1) at the first auxiliary winding.
5. step-down Buck transducer according to claim 4 is characterized in that,
Tie point between the control electrode of first Ohmic resistance (R1) and Buck main switch (Q1) is by second Ohmic resistance (R2) and second input terminal (E2) coupling.
6. according to the described step-down Buck of one of claim 2 to 3 transducer, it is characterized in that,
The work electrode coupling of the control electrode of Buck main switch (Q1) and first auxiliary switch (Q3).
7. according to the described step-down Buck of one of claim 1 to 3 transducer, it is characterized in that,
Step-down Buck transducer also comprises: second auxiliary switch (Q2) is used to start step-down Buck transducer, wherein second auxiliary switch (Q2) has control electrode, work electrode and reference electrode, the wherein reference electrode of second auxiliary switch (Q2) and first input end (E1) coupling, wherein the control electrode of second auxiliary switch (Q2) is by Ohmic resistance (R5) and second input terminal (E2) coupling.
8. step-down Buck transducer according to claim 7 is characterized in that,
The work electrode of second auxiliary switch (Q2) is by the work electrode coupling of Ohmic resistance (R8) with first auxiliary switch (Q3).
9. step-down Buck transducer according to claim 7 is characterized in that,
Step-down Buck transducer also comprises: with the second auxiliary winding (TR1 of Buck inductance coil coupling, w2), it has the first terminal, this the first terminal and first input end (E1) coupling, and this second auxiliary winding has second terminal, the control electrode coupling of this second terminal and second auxiliary switch (Q2).
10. step-down Buck transducer according to claim 9 is characterized in that,
(TR1 is coupled with Ohmic resistance (R7) between the control electrode of second terminal w2) and second auxiliary switch (Q2) at the second auxiliary winding.
11. step-down Buck transducer according to claim 9 is characterized in that,
The second auxiliary winding (TR1, w2) (TR1 w1) is coupled, and makes at Buck inductance coil (TR1 with the Buck inductance coil, w1) during the demagnetization stage electric current is offered the control electrode of second auxiliary switch (Q2), thereby make second auxiliary switch (Q2) end.
12. according to the described step-down Buck of one of claim 1 to 3 transducer, it is characterized in that,
Between first lead-out terminal (A1) and second lead-out terminal (A2), be coupled with at least one capacitor (C2; C3).
13. step-down Buck transducer according to claim 2 is characterized in that,
Current measurement resistance (R6) and Buck main switch (Q1) in series, between tie point (VP1) that limits by Buck diode (D2) and Buck main switch (Q1) and second input terminal (E2) coupling.
14. step-down Buck transducer according to claim 9 is characterized in that,
(TR1 is coupled with the series circuit of Ohmic resistance (R7) and diode (D1) between the control electrode of second terminal w2) and second auxiliary switch (Q2) at the second auxiliary winding.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2008/050581 WO2009089919A1 (en) | 2008-01-18 | 2008-01-18 | Buck converter for making power available to at least one led |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101919146A CN101919146A (en) | 2010-12-15 |
| CN101919146B true CN101919146B (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008801250793A Expired - Fee Related CN101919146B (en) | 2008-01-18 | 2008-01-18 | Buck converter for making power available to at least one led |
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| Country | Link |
|---|---|
| US (1) | US8207683B2 (en) |
| EP (1) | EP2232686B1 (en) |
| JP (1) | JP5216103B2 (en) |
| KR (1) | KR101480687B1 (en) |
| CN (1) | CN101919146B (en) |
| AT (1) | ATE517461T1 (en) |
| TW (1) | TWI471065B (en) |
| WO (1) | WO2009089919A1 (en) |
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2008
- 2008-01-18 JP JP2010542537A patent/JP5216103B2/en not_active Expired - Fee Related
- 2008-01-18 AT AT08701587T patent/ATE517461T1/en active
- 2008-01-18 WO PCT/EP2008/050581 patent/WO2009089919A1/en active Application Filing
- 2008-01-18 EP EP08701587A patent/EP2232686B1/en not_active Not-in-force
- 2008-01-18 US US12/812,960 patent/US8207683B2/en not_active Expired - Fee Related
- 2008-01-18 CN CN2008801250793A patent/CN101919146B/en not_active Expired - Fee Related
- 2008-01-18 KR KR1020107018248A patent/KR101480687B1/en not_active IP Right Cessation
- 2008-12-31 TW TW97151603A patent/TWI471065B/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823023A (en) * | 1982-06-01 | 1989-04-18 | Nippon Chemi-Con Corporation | Transistor with differentiated control switching circuit |
| CN1236500A (en) * | 1996-09-12 | 1999-11-24 | 汤姆森消费电子有限公司 | A forward converter with an inductor coupled to a transformer winding |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-73781A 2007.03.22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011510604A (en) | 2011-03-31 |
| CN101919146A (en) | 2010-12-15 |
| KR101480687B1 (en) | 2015-01-21 |
| EP2232686A1 (en) | 2010-09-29 |
| TWI471065B (en) | 2015-01-21 |
| WO2009089919A1 (en) | 2009-07-23 |
| ATE517461T1 (en) | 2011-08-15 |
| JP5216103B2 (en) | 2013-06-19 |
| TW200935979A (en) | 2009-08-16 |
| US8207683B2 (en) | 2012-06-26 |
| EP2232686B1 (en) | 2011-07-20 |
| KR20100103701A (en) | 2010-09-27 |
| US20110050129A1 (en) | 2011-03-03 |
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